Fetching data from a rrd

[gummybears]

I am trying to fetch data from a rrd via, but don't know how ?
Here is some code

rrd = RRD::Base.new("myrrd.rrd")
tend = Time.now
tstart = tend - 1.month
tstep = 5.minutes
rrd.create :start => Time.now - 1.year, :step => tstep do
datasource "idle", :type => :gauge, :heartbeat => tstep, :min => 0, :max => 100
datasource "irq", :type => :gauge, :heartbeat => tstep, :min => 0, :max => 100
datasource "softirq", :type => :gauge, :heartbeat => tstep, :min => 0, :max => 100
archive :average, :every => 10.minutes, :during => 1.year
end
t = tstart
while t <= tend
rrd.update t, rand(100),rand(100),rand(100)
t = t + tstep
end

now fetch data each datasource ????

rrd.fetch("idle").each do |line|
.....
end

[morellon]

Well, the fetch command gets all data for an archive type not a datasource one.
Try something like this:
rrd.fetch(:average).each {|line| puts line.inspect}

If I am not mistaken, line[0] contains all datasources' titles, the first column in all lines contains the timestamp unix time.

Hope it helps.

[morellon]

any questions, just open a new issue.